Name

       sky2xy - Compute X Y from RA Dec using WCS in FITS and IRAF image files

Synopsis

       sky2xy [-vbjg] file.fts ra1 dec1 ... ran decn
       or
       sky2xy [-vbjg] file.fts @listfile

Description

       sky2xy  (pronounced sky-to-X-Y) is a utility for getting the image coordinates of a set of
       world coordinates in a FITS or IRAF image. World coordinate system  (WCS)  information  in
       the  image  header  describes, in a standard way, the relationship between sky coordinates
       and image pixels. This information is  used  by  the  program  to  transform  image  right
       ascension  and  declination  sky  coordinate  pairs  to image coordinate (X,Y) pairs.  The
       program prints the coordinates at the same system as is given in  the  image  header,  but
       future  versions  will allow transformations to B1950/FK4, J2000/FK5, ecliptic or galactic
       coordinates. Input and output files in the Starbase format will eventually be allowed.

Options

       -b     B1950 (FK4) input

       -e     Ecliptic longitude and latitude input

       -g     Galactic longitude and latitude input

       -j     J2000 (FK5) input

       -g     Galactic longitude and latitude input

       -v     More descriptive output

       -z     Use AIPS classic projections instead of WCSLIB

See Also

       xy2sky()

Author

       Doug Mink, SAO (dmink@cfa.harvard.edu)